Bridge rectifier circuit
Introduction :- In full wave rectifier circuit we need a centre tapped transformer.Some times centre tapped transformers of require voltage is not available in market or price of transformer is more. To solve this problem bridge rectifier is used.
Description:- It consist of four diodes connected as shown in diagram.When supply is given to primary winding, 12 volt ac is induced in secondary winding.During Positive half cycle point 'a' of transformer become positive and point 'b' becomes negative.The current flows trough diode d1 to load and returns through diode d2. During Negative half cycle point 'a' of transformer become Negative and point 'b' becomes positive.The current flows trough diode d3 to load and returns through diode d4. In this way both the half cycles flow through the load making full wave rectification. Capacitor C1 and C2 are used as filter circuit. At many places bridge rectifier is used
without transformer at 230 volt.in such cases PIV of diodes must be more than 1000 volt.
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